We've now got the smaller 25 litre Delta version for an ideal summer daypack for running, cycling or cross country walking over long distances where comfort is concern.The sabre Delta 25 is a rucksack designed initially for extreme use by military personal in all conditions. the main criteria were the need to carry a compact but heavy load for several days with the maximum comfort level available and to prevent muscular fatigue where possible. Its extremely light weight ( 1200g) and is designed for stability at high speeds across tough terrain.The Coolmesh wind tunnel back system moulds to your back to offer the best possible stability and the two raised portions create a cooling channel and spread the weight evenly on your back. The rucksack has a long-back design - it offers the ideal opportunity to comfortably allow the maximum amount of weight to rest on the hip-belt rather than the shoulders. This helps prevent "bergen-burn", reduces upper body fatigue and can help prevent lower back injuries caused by ill fitting rucksacks. An adjustable sternum strap complements this and increases the stability.The easily accessed 25 Litre main compartment is supplemented with large mesh side pockets a secure bungee mesh and two criss-cross straps at the bottom to securely hold over-sized loads.